https://www.cpcwiki.eu/index.php?action=history&feed=atom&title=BIOS_Overall_Memory_Map 2026-08-30T16:39:11Z Revision history for this page on the wiki MediaWiki 1.43.0 https://www.cpcwiki.eu/index.php?title=BIOS_Overall_Memory_Map&diff=65524&oldid=prev 2010-12-19T16:41:18Z

<p></p> <table style="background-color: #fff; color: #202122;" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td> <td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 16:41, 19 December 2010</td> </tr><tr><td colspan="2" class="diff-lineno" id="mw-diff-left-l28">Line 28:</td> <td colspan="2" class="diff-lineno">Line 28:</td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   C004    2h  Pointer to RSX Function Names</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   C004    2h  Pointer to RSX Function Names</div></td></tr> <tr><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   C006    ...  RSX Function Vectors (3bytes each) (1st=Initialization Code)</div></td><td class="diff-marker"></td><td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>   C006    ...  RSX Function Vectors (3bytes each) (1st=Initialization Code)</div></td></tr> <tr><td colspan="2" class="diff-side-deleted"></td><td class="diff-marker" data-marker="+"></td><td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">[[Category:BIOS]]</ins></div></td></tr> </table>

MacDeath https://www.cpcwiki.eu/index.php?title=BIOS_Overall_Memory_Map&diff=39574&oldid=prev 2010-01-24T22:44:17Z

<p>Created page with &#039;== RAM == 0000h 40h Copy of ROM (RST/IRQ Vectors) 0040h User RAM A67Ch 80h User Defined Characters CHR(F0h..FFh) A6FCh 4h AMSDOS Header (for RSX commands…&#039;</p> <p><b>New page</b></p><div>== RAM ==<br /> 0000h 40h Copy of ROM (RST/IRQ Vectors)<br /> 0040h User RAM<br /> A67Ch 80h User Defined Characters CHR(F0h..FFh)<br /> A6FCh 4h AMSDOS Header (for RSX commands)<br /> A700h 500h AMSDOS Data<br /> AC00h 500h BASIC Data<br /> B100h 800h BIOS Data<br /> B900h 200h BIOS Code (relocated from ROM)<br /> BB00h 300h BIOS Vectors<br /> BE00h 40h Stack<br /> BE40h 40h Stack or AMSDOS Data<br /> BE80h 180h Stack<br /> C000h 4000h VRAM<br /> <br /> == BIOS ROM ==<br /> 0000h 40h RST/IRQ Vectors<br /> 0040h 37C0h Stuff<br /> 3800h 800h Character Set (256 characters, 8x8 bits each)<br /> <br /> == BASIC/AMSDOS ROMS ==<br /> C000 1h ROM Type (lower 2bit: 0=Foreground, 1=Background, 2-3=?)<br /> (bit7: 1=prevent KL_FIND_COMMAND from searching<br /> further foreground ROMs)<br /> C001 1h ROM Mark (whatever, usually 0 or 1)<br /> C002 1h ROM Version (usually 00h or higher)<br /> C003 1h ROM Modification (whatever, usually 0)<br /> C004 2h Pointer to RSX Function Names<br /> C006 ... RSX Function Vectors (3bytes each) (1st=Initialization Code)</div>

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